G. M. Allen (1940) thoroughly redescribed the species, but whether one or more species are represented among the named forms remains to be resolved. Two sibling chromosomal species have been recognized (albipes and triton) but soon after refuted based on additional chromosomal data (see Corbet, 1984, and references therein). Song (1985) proposed ningshaanensis for a sample of T. triton from Shaanxi, but Wang (2003) and Zhang et al. (1997) listed it as a subspecies of Cansumys canus (see that account). Karyotypes and B chromosomes from several Chinese samples described by Wang et al (1999). A related fossil species, T. rusa, has been described from Holocene material in NW Iran (Storch, 1974), far outside the range of extant Tscherskia.